Drilling down through DSE DB->schemas->tables->columns the primary key
is not indicated on the primary key column, though the FK is. Also,
showing constraints, the constraint name is shown, but the constraint
table name is shown as 'implicit', (ie. XXX(->IMPLICIT). Why implicit?
Have others found these same things? If this is incorrect, where do I
start debugging?

The DB2 system is version 8.1, new function.
The same definitions in a UDB windows system show correctly (both PK
indicator and constraint XXX(->tableName)).